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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 8 |
| 3 | 41 |
| 4 | 158 |
| 5 | 494 |
| 6 | 1396 |
| 7 | 3483 |
| 8 | 7887 |
| 9 | 16656 |
| 10 | 32978 |
| 11 | 61796 |
| 12 | 110805 |
| 13 | 190899 |
| 14 | 317535 |
| 15 | 512620 |
| 16 | 805407 |
| 17 | 1234930 |
| 18 | 1853318 |
| 19 | 2727241 |
| 20 | 3942003 |
| 21 | 5606725 |
| 22 | 7856671 |
| 23 | 10859471 |
| 24 | 14822922 |
| 25 | 19998333 |
| 26 | 26689677 |
| 27 | 35264602 |
| 28 | 46159229 |
| 29 | 59890851 |
| 30 | 77073115 |
| 31 | 98422454 |
[1,2,8,41,158,494,1396,3483,7887,16656,32978, 61796,110805,190899,317535,512620,805407,1234930, 1853318,2727241,3942003,5606725,7856671,10859471, 14822922,19998333,26689677,35264602,46159229, 59890851,77073115,98422454] |